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clayford

Clay Ford

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FIML in lme4 and lavaan
To the best of my knowledge, FIML is ML. - Doug Bates https://stat.ethz.ch/pipermail/r-help/2004-August/056631.html
A note on Compact Letter Displays
In Compact Letter Displays (CLD), groups that do not differ significantly from each other share the same letter, while groups that do show significant differences will have different letters. However, CLD's are frowned upon and probably shouldn't be used unless it's to appease someone in power, like a reviewer or advisor.
VarCov Matrices for Random Effects
In this note I show how to suppress estimation of covariance random effects when estimating random effects for a categorical predictor.
Demo of a nomogram
Albemarle Homes Report - 2022
Project for PhD Plus, session 5, 2022.
Correlation with lm
From Probabilities to Log-Odds for Simulation
How to transform probabilities to model coefficient log-odds.
Albemarle County Real Estate Data
Simple example of an R Markdown report
Normality is for residuals
Demonstrating that the normality assumption for linear models is for the error term (residuals), not the independent or dependent variables.
Calculating ratio of non-zero probabilities in a hurdle model
A note to accompany a blog post on hurdle models